Materials Literature
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The electrochemical behavior and surface chemistry of anodic silicon etching in nonaqueous electrolytes was studied. Etching of single‐crystal p‐type and n‐type (100) silicon was carried out in acetonitrile and propylene carbonate with hydrofluoric acid (HF) or tetrafluoroborate ( BF 4 − ) providing fluoride to comple…
A new iron(II) compound with the formula [Fe2(L)5(NCS)4]2[Fe(L)2(NCS)2(H2O)2] (I) [where L = 4-(p-tolyl)-1,2,4-triazole] has been synthesized and subjected to X-ray structure determination. Compound I crystallizes in the triclinic space group P–1 (no. 2) with a = 14.5785(11), b = 16.1253(11), c = 16.1963(8) Å, α = 80.…
Photostimulated association and dissociation of anti-dinitrophenyl antibody, anti-DNP-Ab, to and from a dinitrospiropyran photoisomerizable monolayer is probed by surface plasmon resonance (SPR). The anti-DNP-Ab binds to a dinitrospiropyran antigen monolayer, whereas the DNP-Ab dissociates from the protonated dinitrom…
Abstract Superspace group symmetry is used to parameterize the compositional and displacive degrees of freedom associated with the complex, three-dimensional incommensurately modulated (1 − x )Bi 2 O 3 · x Nb 2 O 5 , 0.06 < x < 0.23, type II solid solution. The metal and oxygen ion Atomic Modulation Functions ar…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text V. Yu. Zerov, Yu. V. Kulikov, V. N. Leonov, V. G. Malyarov, I. A. Khrebtov, and I. I. Shaganov, "Features of the operation of a bolometer based on a va…
Abstract Aqueous solutions of pectin, an acidic polysaccharide which occurs in various natural products, was cast into clear films. While the films were flexible enough to be used as wrapping materials, their strength and resistance to water were inferior to presently used commercial films. However, precast films imme…
New observations of the structure of nematic droplets containing material with a low K33/K11 ratio indicate that these droplets adopt a twisted bipolar, rather than concentric, orientation. The data supporting this new interpretation are presented and discussed. These data provide verification for a prediction of Will…
Localized structures named "fingers" form in the vicinity of the unwinding transition of a cholesteric liquid crystal subjected to an electric field and to homeotropic boundary conditions. Several types of fingers exist, with different static and dynamic properties. For instance, cholesteric fingers of the second spec…
Using the new self-consistent, full multiple scattering FEFF8x code we calculate the XANES of the L~,3 edges of Cu, Co, Ni, and other 3d-transition metals, ignoring many body effects other than extrinsic losses. To test the final state rule, we calculate the density of states and XANES with and without core hole. Rema…
In this study we used x-ray photoelectron spectroscopy (XPS) to characterize newly synthesized platinum/zinc-porphyrin assemblies. Our investigation provides information both on the electronic structure and on the composition and conformation of the linked systems. In particular, the N 1s and Pt 4f7/2,5/2 spectra reve…
The hyperbranched polyester based on 4,4-bis-(4′-hydroxyphenyl)pentanoic acid was synthesized with different DP's. A complete 1H and 13C NMR assignment of the oligomers was carried out. Six different structural units were quantified by NMR analysis. The conversion dependence of the content of these structural units an…
Bismuth sodium titanate, (Bi1/2Na1/2)TiO3 (BNT)-based solid solution, a(Bi1/2Nal/2)TiO3-bBaTiO3-cBiFeO3, [BNBTF(100a/100b/100c)], was studied for its dielectric, ferroelectric and piezoelectric properties, as a new group of lead-free piezoelectric ceramics. Curie temperatures, Tc . of the BNBTF ceramics shift to the h…
Abstract In this paper, the thermal contact comfort of a suddenly wetted shirt and some selected mechanical parameters of ten various woven shirt fabrics were measured with the aim of determining the effect of their composition on their complex quality level. In order to explain the thermal contact comfort of superfic…
The theory of moiré fringes on X-ray diffraction topographs of bicrystals is derived from the dynamical theory of X-ray diffraction for the reflection (Bragg) and the transmission (Laue) case. The influence on the moiré fringes of the diffraction geometry, of the geometry of the sample, of its optical properties and o…
Fracture characteristics and mechanical properties of advanced structural ceramics produced by advanced technology and developed for high temperature applications are reviewed from the viewpoint of fractography. The main processing routes for preparation of in situ reinforced ceramic matrix composites, nanocomposites,…
Eleven new polyoxoanion-supported transition metal acetonitrile compositions have been synthesized in 1:1, 1:2, and even a few 1:3 M n + to polyoxoanion ratios; these new precatalysts were then tested for their catalytic efficacy for norbornene and cyclohexene oxygenation using [PhIO] n as the oxidant. The catalytic r…
Piezoelectric ceramics are widely used in industry in such devices as transducers and actuators. While bulk ceramics perform well in most applications, they are limited in use as actuators where large strains are needed. This research examines bulk piezoelectric ceramics with functional gradients of composition in ord…
Results of Wannier orbital-based Hartree–Fock and various correlated ab initio calculations using 6–31G** basis sets are reported for the two boron–nitrogen polymer systems polyaminoborane [BNH4]∞ and polyiminoborane [BNH2]∞. At the Hartree–Fock level the calculated equilibrium geometries, cohesive energies, polymeriz…
Char forming polymers, particularly cellulosics, can best be flame retarded by chem icals that function in the condensed phase. Under heat or fire conditions, these flame retardants enhance crosslinking and aromatization reactions of the polymer at the ex pense of volatilization, leading to increased char formation. I…
29 Si MAS‐NMR, and Ca‐EXAFS experiments have been conducted on calcium silicate hydrates (C‐S‐Hs) with structure derived from wollastonite. Crystalline compounds (wollastonite, xonotlite, hillebrandite, foshagite, 1.1 nm and 1.4 nm tobermorites, and jennite) and C‐S‐H were synthesized and characterized. 29 Si NMR prov…